Study the given diagram carefully and answer the question. The numbers in different sections indicate the number of persons. The circle represents teachers, the square represents men, and the triangle represents post graduates. How many men are there who are NEITHER teachers NOR post graduates?
If x3y:xy::xy:a, then which of the options below gives the value of a?
\(\frac{y^{2}}{x}\)
\(\frac{y^{2}}{x^{2}}\)
\(\frac{y}{x}\)
\(\frac{y}{x^{2}}\)
The sales of three companies X, Y and Z in different years are shown in the following graph. Study the graph and answer the question.
Which company has the highest total sales for the period from year 1996 to 1998? By what percentage is the sales of company Z more than company Y in the year 1997?